Android获取两个日期之间间隔的天数

	/**
	 * 获取两个日期之间的间隔天数
	 * @return
	 */
	public static int getGapCount(Date startDate, Date endDate) {
        Calendar fromCalendar = Calendar.getInstance();  
        fromCalendar.setTime(startDate);  
        fromCalendar.set(Calendar.HOUR_OF_DAY, 0);  
        fromCalendar.set(Calendar.MINUTE, 0);  
        fromCalendar.set(Calendar.SECOND, 0);  
        fromCalendar.set(Calendar.MILLISECOND, 0);  
  
        Calendar toCalendar = Calendar.getInstance();  
        toCalendar.setTime(endDate);  
        toCalendar.set(Calendar.HOUR_OF_DAY, 0);  
        toCalendar.set(Calendar.MINUTE, 0);  
        toCalendar.set(Calendar.SECOND, 0);  
        toCalendar.set(Calendar.MILLISECOND, 0);  
  
        return (int) ((toCalendar.getTime().getTime() - fromCalendar.getTime().getTime()) / (1000 * 60 * 60 * 24));
	}